Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK2016ENCORE BASE, AWDREPAIR AND DIAGNOSISBODY & FRAMEIGNITION SWITCH/STEERING LOCKIMMOBILIZER SYSTEM
2016 Buick Encore Base, AWD
Immobilizer System
2016 Buick Encore Base, AWDSECTION Immobilizer System
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- DTC B2955: Security Sensor
- DTC B302A: Mobile Telephone Communications Interface Requested Immobilization
- DTC B3031: Security Controller In Learn Mode
- DTC B3055: No Transponder Modulation or No Transponder
- DTC B305C: Immobilizer Transponder of Wrong Type Programmed
- DTC B3060: Unprogrammed Transponder Identification Code Received
- DTC B389A: Environment Identification
- DTC B3902: Incorrect Immobilizer Identifier Received
- DTC B3924-B3928: Incorrect Environmental Identifier Received
- DTC B3935: Transponder Authentication
- DTC B3976: Unconfigured Transponder
- DTC B3978-B3982: Incorrect Environmental Identifier Received
- DTC B3984: Device 1 Environment Identifier Not Programmable
- DTC P0513: Immobilizer Key Incorrect
- DTC P0633: Immobilizer Key Not Programmed
- DTC P162B: Remote Vehicle Speed Limiting Signal Message Counter
- DTC P1630: Immobilizer Learn Mode Active
- DTC P1631: Immobilizer Fuel Enable Signal Not Correct
- DTC P1649: Immobilizer Security Code Not Programmed
- DTC P1677: Immobilizer System Disabled
- Symptoms - Immobilizer
- OnStar Stolen Vehicle Slowdown Active
- Repair Instructions
- Description and Operation
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.